'\" te
.\"  Copyright (c) 1995, Sun Microsystems, Inc.  All Rights Reserved
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
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.TH TRAN_TGT_FREE 9E "Nov 1, 1993"
.SH NAME
tran_tgt_free \- request to free HBA resources allocated on behalf of a target
.SH SYNOPSIS
.nf
#include <sys/scsi/scsi.h>



\fBvoid prefix\fR\fBtran_tgt_free\fR(\fBdev_info_t *\fR\fIhba_dip\fR, \fBdev_info_t *\fR\fItgt_dip\fR,
     \fBscsi_hba_tran_t *\fR\fIhba_tran\fR, \fBstruct scsi_device *\fR\fIsd\fR);
.fi

.SH INTERFACE LEVEL
illumos architecture specific (illumos DDI).
.SH PARAMETERS
.ne 2
.na
\fB\fIhba_dip\fR \fR
.ad
.RS 13n
Pointer to a  \fBdev_info_t\fR structure, referring to the \fBHBA\fR device
instance.
.RE

.sp
.ne 2
.na
\fB\fItgt_dip\fR \fR
.ad
.RS 13n
Pointer to a  \fBdev_info_t\fR structure, referring to the target device
instance.
.RE

.sp
.ne 2
.na
\fB\fIhba_tran\fR \fR
.ad
.RS 13n
Pointer to a  \fBscsi_hba_tran\fR(9S) structure, consisting of the \fBHBA\fR's
transport vectors.
.RE

.sp
.ne 2
.na
\fB\fIsd\fR \fR
.ad
.RS 13n
Pointer to a  \fBscsi_device\fR(9S) structure, describing the target.
.RE

.SH DESCRIPTION
The \fBtran_tgt_free()\fR vector in the \fBscsi_hba_tran\fR(9S) structure may
be initialized during the \fBHBA\fR driver's \fBattach\fR(9E) to point to an
\fBHBA\fR driver function to be called by the system when an instance of a
target device is being detached.  The \fBtran_tgt_free()\fR vector, if not
\fINULL\fR, is called after the target device instance has returned
successfully from its \fBdetach\fR(9E) entry point, but before the
\fBdev_info\fR node structure is removed from the system. The \fBHBA\fR driver
should release any resources allocated during its \fBtran_tgt_init()\fR or
\fBtran_tgt_probe()\fR initialization performed for this target device
instance.
.SH SEE ALSO
.BR attach (9E),
.BR detach (9E),
.BR tran_tgt_init (9E),
.BR tran_tgt_probe (9E),
.BR scsi_device (9S),
.BR scsi_hba_tran (9S)
.sp
.LP
\fIWriting Device Drivers\fR
